Hi, I have OP27 interface with S7 300, so i would like to backup all cofigurations in OP27, but in the instruction mentioning about delete flash memory before reached to transfer section, therefore I am not quite sure the delete flash memory have to be impact to setting in OP27? please device.

Hello,

Here is a link to manual: OP27, OP37 Operator Panels

See chapter 9.3

Have you seen this link:

How to Backup and restore a program on a text or graphic-based panel?

Best regards,

Wizard